A quasar in different colours

GROND images of the quasar PKS 1251-407. GROND observes simultaneously through 7 different filters in the visible and near-infrared, providing 7 images of the same object. In this case, the quasar appears much fainter in the blue images (the so-called Lyman drop-out), an indication of the quasar's distance.

Credit:

ESO

Over de afbeelding

Id:eso0730b
Type:Observatie
Publicatiedatum:6 juli 2007
Gerelateerde berichten:eso0730
Grootte:2781 x 387 px

Over het object

Naam:PKS 1251-407
Type:Early Universe : Galaxy : Activity : AGN : Quasar
Afstand:z=4.46 (roodverschuiving)
Categorie:Quasars and Black Holes

Image Formats

Grote JPEG
251,6 KB

Kleuren & filters

BandTelescoop
InfraroodMPG/ESO 2.2-metre telescope
GROND
OptischMPG/ESO 2.2-metre telescope
GROND